<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Document</title>
        <style>
            [v-cloak]{
                display:none;
            }
        </style>
    </head>
    <body>
        <div id="app" v-cloak>
            {{msg}}
        </div>
        <script src="my-vue.js"></script>
        <script>
        var vm = new Vue({
            el:'#app',
            data:{
                msg:'hello'
            },
            methods:{
                sayHello(){
                    console.log('hello')
                }
            }
        });
       
    </script>
    </body>
</html>